RE: Published paper5 Dec 2024 12:26
Results
All doses of POLB 001 significantly reduced clinically observed CRS scores. POLB 001 treatment showed statistically significant reductions in IL-6 (at high-dose), IL-4 (low- and high-dose), IL-8 (all doses) and MIP-1α (all doses) and a trend of reduced cytokine production in all other cytokines tested (IFN-γ, TNF, IL-10, IL-2). Adalimumab and POLB 001 effectively prevented CRS symptoms, however POLB 001 produced superior cytokine inhibition (ns). While adalimumab also significantly reduced IFN-γ, TNF, IL-6, and MIP-1α, some cytokines were elevated, including IL-10, IL-4, and IL-2 and there was no significant effect on IL-8. These results indicate that POLB 001 may be effective in preventing CRS. Both test articles were well tolerated.
Conclusion
In a model of anti-CD28 induced CRS, POLB 001 was shown to dose dependently reduce clinical CRS scores. POLB 001 significantly reduced peak serum levels of IL-4, IL-6, IL-8 and MIP1-α; all other cytokines tested, including IFN-γ, TNF, IL-10 and IL-2, showed trends of reduced peak serum levels. In combination with a previous successful trial in healthy human volunteers, the results of this animal study further support development of POLB 001 in a Phase 2 clinical study as a prophylactic for the prevention of immunotherapy-induced CRS.